HOLSTERS WILL FIT: Sig Sauer | 3.90" BBL | With Light | P320 Compact and Carry 9mm and .40 S&W, X-Carry, or M18 W/ Streamlight TLR-7, Surefire XC-1, XC-2, Nightstick TCM 550, or Inforce APLc Holster will have full retention capability with or without a light attached